>>126921835
Sounds like you need an oscilloscope. Without going into all the troubleshooting I did, I removed corrosion from the opamp and surrounding components, noticed one leg of the opamp had lifted from its pad, so I removed it completely, cleaned the pads, and reinstalled. The potentiometer was out of spec and also super stiff. I didnt bother cleaning it and just threw in a new 25ka pot. The voltage regulator (7805 in this case) had seen a lot of heat (im guessing due to it being an old EH pedal and people never using the correct power supplies) so I replaced it as well. I normally hate working on smd boards but this one was fairly painless and took maybe half an hour to get back up and running. Now I need to throw together an effects loop board for it to live on. Picrel is post QD cleaner and scrubbing with toothbrush. I wish I had taken a before, it was rough.